don't disable uart "thingies" those are your true serial ports...uart 16550A is the standard serial port. what you may want to do is compile isapnp support in your kernel if your modem is plug & pray. that way, you won't need to use isapnptools.
now for the next step, read the kernel-HOWTO to learn how to compile your kernel. ;) -- Sent through GMX FreeMail - http://www.gmx.net